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| Number | Title | Issue Date |
| 8113299 | Drill mast articulation assembly A jib assembly for use with a drill rig includes a jib boom having a first end and a second end. The jib boom is to rotate about the first end and the second end is configured to be coupled to a mast assembly mount. The jib assembly also includes an articulation ass... | 02/14/2012 |
| 8109346 | Drill bit supporting multiple cutting elements with multiple cutter geometries and method of assembly A drill bit has cutting elements with multiple cutting surface geometries that are positioned so that their cutting profiles overlap, but do not completely contain or engulf one another. The different cutting surface geometries and the specific overlap create a zone... | 02/07/2012 |
| 8100197 | Method and device for the production of bores A method and a device for the production of a bore with a special shape, for example a bore which deviates from a cylindrical shape or a bore with an undercut. First, a first bore portion is produced using an oscillatingly driven tool, the first bore portion having ... | 01/24/2012 |
| 8087478 | Cutting elements including cutting tables with shaped faces configured to provide continuous effective positive back rake angles, drill bits so equipped and methods of drilling A cutting element for a drag-type earth-boring drill bit includes a cutting table with a face including a region that is configured to cut into a formation at a positive back rake angle and to direct formation cuttings, or chips, that have been cut from the earth fo... | 01/03/2012 |
| 8074741 | Methods, systems, and bottom hole assemblies including reamer with varying effective back rake Reamer bits have cutters with different effective back rake angles. Drilling systems include a pilot bit and a reamer bit, wherein cutters in shoulder regions of the reamer bit have a greater average effective back rake angle than cutters in shoulder regions of the ... | 12/13/2011 |
| 8074742 | Apparatus and method for cutting a wellbore An apparatus for cutting a wellbore includes a motor with a stator and a rotor. The rotor includes an output shaft connected to a cutting structure to drive the cutting structure in use. The stator and rotor are spaced radially outwardly of the axis of the rotor suc... | 12/13/2011 |
| 8066084 | Drilling apparatus with reduced exposure of cutters and methods of drilling A rotary drilling apparatus and method for drilling subterranean formations, including a body being provided with at least one cutter thereon exhibiting reduced, or limited, exposure to the formation, so as to control the depth-of-cut of the at least one cutter, so ... | 11/29/2011 |
| 8061445 | Drilling fluid pump systems and methods A system for pumping fluid (e.g., but not limited to, drilling fluid), the system having pump apparatus; including a plurality of removable pump modules; and, in certain aspects, removable valve cartridges for such modules. ... | 11/22/2011 |
| 8051924 | Methods of braking core barrel assemblies A braking device for drilling operations in a borehole includes a brake retainer having a plurality of brake connector openings defined therein, a body member having a tapered surface having a first diameter and a second diameter, the second diameter being larger th... | 11/08/2011 |
| 8051923 | Rotary drill bits with gage pads having improved steerability and reduced wear A rotary drill bit having blades with gage pads disposed on exterior portions thereof to improve steerability of the rotary drill bit during formation of a directional wellbore without sacrifice of lateral stability. One or more of the gage pads may include radially... | 11/08/2011 |
| 8047303 | Drilling rig drawworks installation Methods and systems for installing a drawworks on a drilling rig, the method, in certain aspects, including moving a drawworks on movement apparatus on the ground adjacent a drill floor of a rig, connecting the drawworks to the drill floor, moving the movement appar... | 11/01/2011 |
| 8047304 | Expandable reamer for subterranean boreholes and methods of use An expandable reamer apparatus and methods for reaming a borehole are disclosed, including at least one laterally movable blade carried by a tubular body selectively positioned at an inward position and an expanded position. The at least one laterally movable blade,... | 11/01/2011 |
| 8028764 | Methods and apparatuses for estimating drill bit condition A drill bit for drilling subterranean formations includes a bit body bearing at least one gage pad and a shank extending from the bit body. An annular chamber is formed within the shank. A data evaluation module is disposed in the annular chamber and includes a proc... | 10/04/2011 |
| 8028765 | Drill bit, drilling system, and related methods A rotary drag bit for use in subterranean earth boring operations, the drag bit having blades, rows of cutters on the blades, and nozzles disposed within the rows. The nozzles are configured to discharge fluid during drilling. ... | 10/04/2011 |
| 8028763 | Downhole tool The present invention relates to downhole tools, and in particular an underreamer tool for use in a wellbore of an oil or gas well and a method of actuation. In an embodiment, the underreamer tool has body having a longitudinal axis and a fluid conduit, a tool eleme... | 10/04/2011 |
| 8020635 | Expandable reamer apparatus An expandable reamer apparatus and methods for reaming a borehole, wherein a laterally movable blade carried by a tubular body may be selectively positioned at an inward position and an expanded position. The laterally movable blade, held inwardly by blade-biasing e... | 09/20/2011 |
| 8020634 | Method and apparatus for supporting a downhole component in a downhole drilling tool An apparatus for supporting a retrievable downhole component within a drill collar includes a sleeve that is positionable about the downhole component and is mounted within the drill collar. The sleeve is adapted to limit the lateral movement of the downhole compone... | 09/20/2011 |
| 8016050 | Methods and apparatuses for estimating drill bit cutting effectiveness A drill bit for drilling a subterranean formation includes a plurality of cutting elements and a shank extending from a bit body. A set of accelerometers disposed in the drill bit include a radial accelerometer and a tangential accelerometer. An annular chamber is f... | 09/13/2011 |
| 8016051 | Drilling apparatus and method for drilling wells A device for boring a well. The device is attached to a motor that has a power shaft for imparting rotational movement. The device includes a driver operatively connected to the power shaft, with the driver containing a cylindrical body, a first bit having a first e... | 09/13/2011 |
| 8011450 | Active bottomhole pressure control with liner drilling and completion systems One exemplary APD Device is used with a liner drilling assembly to control wellbore pressure. The APD Device reduces a dynamic pressure loss associated with the drilling fluid returning via a wellbore annulus. Another exemplary APD Device is used to control pressure... | 09/06/2011 |
| 8006783 | Helical drilling apparatus, systems, and methods A down-the-hole assembly includes a housing having a central axis and a mechanical gear box positioned within the housing. The mechanical gear box is coupled to the housing such that rotation of the housing at a first rotational rate provides a rotary input to the m... | 08/30/2011 |
| 7997354 | Expandable reamers for earth-boring applications and methods of using the same Expandable reamer tools include an outer body, a fluid passageway extending through the outer body, and at least one blade configured to slide relative to the outer body between a retracted position and an expanded position in a direction oriented at an acute angle ... | 08/16/2011 |
| 7987926 | Tension/collar/reamer assemblies and methods The present invention provides drilling assembles and methods that are especially useful for a bottom hole drilling assembly for drilling/reaming/or other operations related to drilling a borehole through an earth formation. In one embodiment, the drilling assembly ... | 08/02/2011 |
| 7975780 | Adjustable downhole motors and methods for use The present invention relates to systems and methods for controlling downhole motors and drilling systems incorporating such systems and methods. One aspect of the invention provides a downhole drilling system including: a downhole motor, a transmission coupled to t... | 07/12/2011 |
| 7975779 | Threaded cone retention system for roller cone bits An apparatus for retaining a roller cone on a bearing pin of a drill bit body that includes a drill bit body; a bearing pin coupled to the drill bit body; a retention member coupled to the bearing pin; a roller cone coupled to the retention member; and a torque tran... | 07/12/2011 |
| 7958951 | Method for assembling an underreaming tool An underreaming tool may include a tubular body, a drive tube, at least one blade element (“the blade element”), at least one wedge element (“the wedge element”), and a stop mechanism. The drive tube may include at least one longitudinal groove (“the longi... | 06/14/2011 |
| 7946359 | Methods and apparatus for well construction A method of constructing a borehole drilled with a drilling apparatus (16), the method comprises: connecting a flexible tubular liner sleeve (22) around the outside of the drilling apparatus and connecting the sleeve around an upper opening of the bore... | 05/24/2011 |
| 7938198 | Rotary digging and compression enlarging driller and boring method A compression enlarging driller comprises a vehicle body; a pole; an outer drilling rod; an inner drilling rod disposed within the outer drilling rod and moveable in a longitudinal direction; a windlass; a connecting lever having an upper end connected with a lower ... | 05/10/2011 |
| 7926590 | Method of liner drilling and cementing utilizing a concentric inner string A method of drilling a well and installing a liner includes assembling concentric inner and outer strings of tubulars. A drill bit is located at the lower end of the inner string and a liner with a liner hanger makes up part of the outer string. The inner and outer ... | 04/19/2011 |
| 7918288 | Drill bits with enclosed fluid slots and method Core drill bits with long crown heights are described herein. The core drill bits have a series of slots or openings that are not located at the tip of the crown and are therefore enclosed in the body of the crown. The slots may be staggered and/or stepped throughou... | 04/05/2011 |
| 7896106 | Rotary drag bits having a pilot cutter configuraton and method to pre-fracture subterranean formations therewith A rotary drag bit exhibiting enhanced cutting efficiency and extended life is provided. The rotary drag bit comprises a bit body having a face surface, and a plurality of cutters coupled to the face surface of the bit body. The plurality of cutters comprises at leas... | 03/01/2011 |
| 7886847 | Monitoring flow rates while retrieving bottom hole assembly during casing while drilling operations A bottom hole assembly in a casing-while-drilling operation is retrieved by reducing the density of the fluid in the casing string above the bottom hole assembly, creating an upward force on the bottom hole assembly. As the bottom hole assembly moves upward in the c... | 02/15/2011 |
| 7878268 | Oilfield well planning and operation A system for performing a drilling operation for an oilfield. The system includes a drilling system for advancing a drilling tool into a subterranean formation, a repository storing multiple survey factors for at least one wellsite of the oilfield and multiple drill... | 02/01/2011 |
| 7874380 | Method and device for drilling, particularly percussion or rotary percussion drilling, a hole in soil or rock material A method and device for drilling, particularly percussion drilling or rotary percussion drilling a hole in soil or rock material and fixing an anchoring in the hole. To this end, a drilled hole is made by a drill bit mounted on a drill rod. The drill rod, on the rea... | 01/25/2011 |
| 7874381 | Pneumatic line deicing system A wellbore servicing method comprising supplying a deicing fluid to a pressurized pneumatic line on a drilling rig, whereby the deicing fluid retards the formation of ice within the pressurized pneumatic line. A wellbore servicing apparatus comprising a pump, a sigh... | 01/25/2011 |
| 7857075 | Wellbore drilling system A method related to restarting a drilling process includes the steps of applying a surface torque to a drill string in a borehole, detecting signals related to one of a torque and a rotational speed experienced at a bottom hole assembly, initiating drilling fluid fl... | 12/28/2010 |
| 7857076 | Force balancing system for use with a well bore tool A force balancing system for use with a well bore tool, such as a drilling tool, is provided. The tool may be connected to a drill string, and the force balancing system is adapted to decouple the weight of the drill string from the operation of the tool. The force ... | 12/28/2010 |
| 7854275 | Spring-operated anti-stall tool An anti-stall tool in an oil well drilling assembly that controls reciprocation of the drill bit by a controller that alters weight-on-bit (WOB) depending upon measured downhole pressure or torque. The downhole controller keeps the drill bit rotating by maintaining ... | 12/21/2010 |
| 7845430 | Compliantly coupled cutting system A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and a first plurality of gauge pads. The head may include a first plurality of cutters coupled with an end of the head, and the head may be movably coupled w... | 12/07/2010 |
| 7841425 | Drilling subsurface wellbores with cutting structures A system for forming a wellbore includes a drill tubular. A drill bit is coupled to the drill tubular. One or more cutting structures are coupled to the drill tubular above the drill bit. The cutting structures remove at least a portion of formation that extends int... | 11/30/2010 |
